gr-qc papers | Gist.Science

Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.

At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.

⚛️ general relativity

A generalization of the Fredenhagen-Haag derivation of Hawking radiation for a class of Vaidya space-times

This paper generalizes the Fredenhagen-Haag derivation of Hawking radiation to a class of Vaidya space-times by establishing a two-sided detector-response inequality through quantitative estimates on massless scalar fields, thereby demonstrating convergence to the standard thermal form under asymptotic stationarity while addressing the limitations of finite-mass evaporation scenarios.

Felipe Dilho Alves2026-08-05

⚛️ general relativity

New gravitational instanton: shadow of an extra dimension

This paper presents an exact gravitational instanton solution on a five-dimensional conformally invariant Kerr-like warped brane-world manifold, constructed via stereographic projection and $\mathbb{Z}_2$ symmetry to reveal a self-dual Kähler structure.

Reinoud Jan Slagter2026-08-05

⚛️ general relativity

Gravitational redshift as a quantum channel: modeling the effects of gravitational redshift in quantum optics

This paper resolves inconsistencies in previous models of gravitational redshift as a quantum channel by identifying their root cause and proposing two complementary corrections—one field-theoretic and one adapted to finite-dimensional quantum mechanics—that enable the characterization of redshift effects on Gaussian states of light using standard quantum information techniques.

Thomas Mieling, Andreas Wolfgang Schell, David Edward Bruschi2026-08-05

⚛️ general relativity

General-relativistic structure of two-component quantum dark fermion stars

This paper presents a general-relativistic framework for two-component quantum dark fermion stars, demonstrating how their unique equilibrium structures and tidal deformability signatures can be distinguished from neutron stars and black holes to constrain dark-sector microphysics using multi-messenger gravitational-wave and astrometric observations.

Ilídio Lopes2026-08-05

⚛️ general relativity

Integrated cosmological memory: A dark-siren method to probe dark energy

This paper proposes a novel, catalog-free "dark siren" method that leverages the Integrated Cosmological Memory (ICM) alongside standard gravitational-wave signals to break distance-redshift degeneracy and provide robust constraints on dark energy, potentially mitigating the Hubble tension without relying on electromagnetic counterparts or galaxy catalogs.

Indranil Chakraborty, Sayantan Ghosh, Susmita Jana, Archana Pai, S. Shankaranarayanan2026-08-05

⚛️ high-energy theory

Logarithmic Soft Photon Theorem and Waveform Tails in Higher Dimensions

This paper derives the leading logarithmic soft-photon theorem in spacetime dimensions greater than four and its classical radiative counterpart, demonstrating how one-loop quantum corrections and long-range acceleration effects generate universal early- and late-time tails in electromagnetic waveforms that distinguish between intrinsically quantum and classically radiative contributions.

Biswajit Sahoo2026-08-05

⚛️ general relativity

Charged topological geons with a self-gravitating scalar field

This paper investigates static, spherically symmetric, charged topological geons supported by a self-gravitating scalar field with negative kinetic energy, demonstrating that their gravitational mass is uniquely determined by their electric charge and size, and proposing them as potential classical models for dark matter particles beyond the Standard Model.

Alexander Tsirulev2026-08-05

⚛️ general relativity

A Tale of Two Couplings: Bayesian Selection in the Interacting Dark Sector

This paper demonstrates that generalized interacting dark sector models with purely conformal couplings successfully resolve the $\sigma_8$ tension by suppressing late-time structure growth while mimicking $\Lambda$ CDM background evolution, thereby achieving a statistically superior fit to observational data compared to both the standard $\Lambda$ CDM model and scenarios involving disformal couplings.

Miguel Barroso Varela, Álvaro de la Cruz-Dombriz2026-08-05

⚛️ general relativity

Consistent first order action functional for gauge theories

This paper demonstrates that a novel first-order action functional consistently incorporates gravity and matter fields, offering a robust new pathway toward the unification of fundamental interactions within a more fundamental theory of General Relativity and the Standard Model.

Priidik Gallagher, Tomi S. Koivisto, Luca Marzola, Ludovic Varrin, Tom Zlosnik2026-08-04

🔭 astrophysics

Can nonlocal gravity really explain dark energy?

This paper demonstrates that nonlocal modifications to General Relativity, specifically an Infinite Derivative Gravity model of the Ricci scalar without a cosmological constant or scalar fields, can dynamically explain the Universe's accelerated expansion and offers a technique to derive verifiable predictions such as a decreasing effective gravitational constant.

Salvatore Capozziello, Anupam Mazumdar, Giuseppe Meluccio2026-08-04

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